Asce 20-96 Standard Guidelines For The Design And Installation Of 2021 -

| Type | Description | Bedding Material | Compaction | | :--- | :--- | :--- | :--- | | | Flat bottom, no haunch support | Native soil (poor) | Minimal | | Type 2 | Shaped bottom, limited haunch | Sand or crushed stone | Moderate (90% Std Proctor) | | Type 3 | Full haunch support | Well-graded granular material | High (95% Std Proctor) | | Type 4 | Concrete cradle | Controlled low-strength material (CLSM) or concrete | Not applicable |

The guidelines are structured to guide an engineer through the entire lifecycle of a piling project, from the initial site investigation to the final load test. 1. Design Considerations | Type | Description | Bedding Material |